8726 workflow add a test button in workflow code step (#9016)

- add test button to workflow code step
- add test tab to workflow code step


https://github.com/user-attachments/assets/e180a827-7321-49a2-8026-88490c557da2



![image](https://github.com/user-attachments/assets/cacbd756-de3f-4141-a84c-8e1853f6556b)

![image](https://github.com/user-attachments/assets/ee170d81-8a22-4178-bd6d-11a0e8c73365)

packages/twenty-ui/src/input/button/components/Button.tsx

@@ -367,7 +367,7 @@ const StyledSeparator = styled.div<{
   background: ${({ theme, accent }) => {
     switch (accent) {
       case 'blue':
-        return theme.color.blue30;
+        return theme.border.color.blue;
       case 'danger':
         return theme.border.color.danger;
       default:
@@ -387,7 +387,7 @@ const StyledShortcutLabel = styled.div<{
   color: ${({ theme, variant, accent }) => {
     switch (accent) {
       case 'blue':
-        return theme.color.blue30;
+        return theme.border.color.blue;
       case 'danger':
         return variant === 'primary'
           ? theme.border.color.danger